The principle of electrical testing solutions mainly includes the following aspects:
Principle of Electrical Parameter Detection: Electrical parameter detection is one of the important contents of power detection, mainly including the detection of parameters such as voltage, current, power, frequency, etc. The detection principle of these parameters is mainly based on basic electrical principles such as electromagnetic induction, Ohm's law, and power formula. For example, voltage detection can be achieved by converting high voltage to low voltage through a voltage transformer, and then measuring it through a voltmeter; The detection of current can be achieved by converting high current into low current through a current transformer, and then measuring it through an ammeter; The detection of power can be calculated by measuring the product of voltage and current, or directly measured by a power meter; Frequency detection can be achieved by measuring the period of alternating current using a frequency meter, and then calculating the frequency.
Principle of insulation resistance test: Insulation resistance test is to apply a certain DC voltage to the insulation, measure the resistance of the insulation, and reflect the current flowing through the insulation. This method is used to evaluate the performance and reliability of insulation materials.
The principle of electrical strength testing: Electrical strength testing (also known as withstand voltage testing) is to apply high voltage to the tested material and observe whether it will cause breakdown. This test is destructive, and once it breaks down, it indicates that the material is not qualified. The testing method involves applying a processing frequency voltage on a circular test piece, gradually increasing the voltage until breakdown occurs. The testing equipment should meet relevant standards, such as IEC standards or national standards.
Principle of short-circuit test: In the power system, short-circuit tests include transformer short-circuit tests and generator short-circuit tests, which are used to verify the stability of related equipment and obtain important equipment parameters. The short-circuit test mainly locates the fault point through observation and disassembly detection.
